American Caraboidea 231 



prominent, at just visibly less than their own length from the base, 

 the base of the head behind them subcircularly rounded; central 

 red spot distinct; punctures somewhat finer basally; pubescence 

 abundant; antennae slender, the first joint bright rufous, two to 

 four piceous, the remainder dark brown, the fourth (cf ) about four 

 times as long as wide, nearly so (9); prothorax slightly (9), 

 distinctly (cf ), longer than wide, widest before the middle, the sides 

 subevenly rounded, becoming gradually sinuate before the basal 

 angles, which are very obtuse though laterally somewhat prominent; 

 punctures fine, rather close, the surface rather dull; fovese large, 

 concave, faintly prolonged anteriorly to beyond the middle; elytra 

 twice as long as wide (cf ), nearly so ( 9 ), barely twice as wide as the 

 prothorax, the general form and punctuation as in all the preceding, 

 the striae fine, obscurely punctulate, the subscutellar series distinct; 

 anterior male tarsi asymmetrically dilated though more narrowly 

 than usual, the first joint rather longer than the next two combined. 

 Length (cf 9 ) 15. 0-15. 5 mm.; width 4.9-5.5 mm. California 



(San Diego), — Dunn californica Mann. 



A — Similar to californica but less slender and with a relatively some- 

 what smaller prothorax, which is however similar in form, except 

 that the lateral sinus is more shallow, the obtuse angles less 

 prominent laterally; eyes similarly prominent; fourth antennal 

 joint between three and four times as long as wide in both sexes; 

 elytra similar but broader, never quite so much as twice as long 

 as wide, the striae similarly fine. Length (cf 9) 15. 0-15. 8 mm.; 



width 5.2-5.7 mm. Arizona and Texas arizonica n. subsp. 



Form much more abbreviated, smaller in size, more ventricose, similar 

 in coloration, lustre and sculpture; head only slightly longer than 

 wide, the eyes prominent, at their own length from the base, the 

 base circularly rounded; red central spot similar; antennae shorter, 

 the fourth joint barely three times as long as wide, the coloration 

 as in californica, except that joints two to four are more nearly black; 

 prothorax almost similar in outline but relatively smaller and 

 narrower, barely visibly wider than the head, the evenly rounded 

 sides more gradually and shallowly sinuate basally, the angles not 

 prominent laterally, rounded; elytra very much shorter and re- 

 latively wider, barely three-fifths longer than wide, two and one- 

 half times as wide as the prothorax; striae about twice as coarse and 

 deeper, much less evidently punctulate. Length (9) 14.0 mm.; 



width 5.0 mm. Arizona (Yuma), — Dunn infirma Csy. 



14 — Strial intervals somewhat coarsely, closely and roughly punctate. 

 Form nearly as in janiis; head, palpi, antennae, body beneath and 

 legs black; prothorax reddish-yellow, the elytra decidedly bluish; 

 head oval, very broad behind the eyes, somewhat as in janus, 

 coarsely and densely punctate; prothorax as in janus, oval, narrowed 

 behind, broadest in front of the middle; hind angles very obtuse, 

 the surface somewhat densely and coarsely punctate; elytra oval, 

 rather depressed, black, the surface decidedly blue, especially at 

 the sides, striate, the striae distantly punctured; surface sparsely 

 pubescent; under surface more shining, less closely punctate and 



